预约成功
2)表示客观上的可能性
You can borrow this useful book from the library .
你可以从图书馆借到这种有用的书。转自环 球 网 校edu24ol.com
A more suitable person than him for the job can not be found . 不可能找到比他更适合这份工作的人了。
Now people can skate on the lake .现在人们可以在湖上滑冰了。
When the storm stopped , the plane could take off .
当风暴停下来时，飞机可以起飞了不得。
3)表示主观上的允许
Can I ask you some questions about it ?
我可以问你有关这件事的几个问题吗?：
You can not leave here till I come back .直到我回来你才能离开。
Such kind of thing can't happen any more later .
这类事以后不准再发生了。
Can you tell me how to get to the airport ? 你能告诉我怎么去机场吗?
Could you tell me how to get to the airport ?
您能告诉我怎么去机场吗?
Could I be forgiven my negligence ? 请原谅我的疏忽，行吗?
